6406662390 has 32 divisors (see below), whose sum is σ = 15461902080. Its totient is φ = 1698897504.

The previous prime is 6406662373. The next prime is 6406662391. The reversal of 6406662390 is 932666046.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6406662391) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 591154 + ... + 601893.

It is an arithmetic number, because the mean of its divisors is an integer number (483184440).

Almost surely, 2^6406662390 is an apocalyptic number.

6406662390 is an abundant number, since it is smaller than the sum of its proper divisors (9055239690).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6406662390 is a wasteful number, since it uses less digits than its factorization.

6406662390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1193236.

The product of its (nonzero) digits is 279936, while the sum is 42.

The square root of 6406662390 is about 80041.6291063594. The cubic root of 6406662390 is about 1857.2795615825.

The spelling of 6406662390 in words is "six billion, four hundred six million, six hundred sixty-two thousand, three hundred ninety".